US 11,930,358 B2
Seamless handoff between wireless access gateways
Mark Libby, Groton, MA (US); Deepak Garg, Nashua, NH (US); Girish Nair, Nashua, NH (US); and Narsi Veldanda, Northboro, MA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Nov. 3, 2020, as Appl. No. 17/087,788.
Application 17/087,788 is a continuation of application No. 15/388,321, filed on Dec. 22, 2016, abandoned.
Claims priority of provisional application 62/273,625, filed on Dec. 31, 2015.
Prior Publication US 2021/0051476 A1, Feb. 18, 2021
Int. Cl. H04W 12/06 (2021.01); H04L 9/40 (2022.01); H04W 12/08 (2021.01); H04W 36/00 (2009.01); H04W 76/12 (2018.01); H04W 88/16 (2009.01); H04W 92/22 (2009.01)
CPC H04W 12/06 (2013.01) [H04L 63/029 (2013.01); H04W 36/0011 (2013.01); H04W 76/12 (2018.02); H04L 63/0281 (2013.01); H04L 63/0892 (2013.01); H04W 12/08 (2013.01); H04W 88/16 (2013.01); H04W 92/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of data communication between an access network and a core network, the method comprising:
receiving, by a first wireless access gateway (WAG) in the access network, a first data packet corresponding to a first data flow transmitted from a user equipment (UE), wherein the access network resides outside of the core network, and wherein the core network is a central part of a mobile network to which the first WAG provides direct connectivity;
forwarding, by the first WAG, the first data packet to the core network;
receiving, by a second WAG in the access network, a second data packet transmitted from the UE;
in response to receiving the second data packet, the second WAG determining an identity of the first WAG;
in response to determining the identity of the first WAG, establishing a GPRS Tunneling Protocol (GTP) tunnel connection between the first WAG and the second WAG;
after establishing the GTP tunnel connection, receiving by the second WAG a third data packet corresponding to the first data flow transmitted from the UE;
transmitting, by the second WAG to the first WAG via the GTP tunnel connection, the third data packet; and
forwarding, by the first WAG, the third data packet to the core network.